I've had playstations for multiple console generations, but I just ordered an OLED Deck as my first ever "gaming PC". Forgive the naivety, but could non-supported titles potentially get Dualsense features modded in?
Yeah, that's what steam input did, it emulates a controller on the fly, you can even emulate a keyboard and mouse in games that don't support controllers, I have a steam controller and in most fps I configured it to emulate a controller but with mouse look on the right touch pad and gyroscope on a light press on left trigger, unfortunately some games don't support simultaneous mouse and controller use, other games change UI when switching between mouse and controller, which may be annoying
Touchpad always works, but the haptic triggers and rumble need you to be wired. They also only work in supported games like Spiderman. I remember needing to go into desktop mode to enable the controller's "speaker" for the rumble.